Wirecutter has a good guide: https://thewirecutter.com/reviews/best-robot-vacuum/

But honestly, actual needs are going vary by what your house is like, who lives in it, how they live, and what their standards are. And on how your habits and preferences adjust as you get used to what they can do for you.

At the end of the day, none of these are as good as manual vacuuming. But they're way better than not vacuuming. I'm sure it's frustrating to have to just try one and see, but I honestly don't think there's a better approach.